From 056b2e33e5bde313ca2a9c2d0f2374c459aa10ac Mon Sep 17 00:00:00 2001
From: Stefano Ceccherini <stefano.ceccherini@gmail.com>
Date: Sun, 8 Jun 2014 18:59:00 +0200
Subject: [PATCH] ifconfig: fail with a warning if called on a non-existent
 interface.

---
 src/bin/network/ifconfig/ifconfig.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/bin/network/ifconfig/ifconfig.cpp b/src/bin/network/ifconfig/ifconfig.cpp
index f8e577eed2..b9c481dbc2 100644
--- a/src/bin/network/ifconfig/ifconfig.cpp
+++ b/src/bin/network/ifconfig/ifconfig.cpp
@@ -509,6 +509,11 @@ list_interface(const char* name)
 	// get link level interface for this interface
 
 	BNetworkInterface interface(name);
+	if (!interface.Exists()) {
+		printf("Interface not found!\n");
+		return false;
+	}
+
 	BNetworkAddress linkAddress;
 	status_t status = interface.GetHardwareAddress(linkAddress);
 	if (status == B_OK) {